Gilbert c



(No Model.)-

G. C. ILES. SAW.

No. 424,301. Patented Mar. 25, 1890.

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the edge of my improved saw.

UNITED STATES PATENT OFFICE.

GILBERT O. ILES, OF FREDERIOKTOWN, OHIO.

SAW.

SPECIFICATION forming part of Letters Patent No. 424,301, dated March 25, 1890.

Application iiled September 27, 1889. Serial No. 325,256. (No model.)

To all whom, it may concern:

Be it known that I, GILBERT O. ILES, a citizen of the United States, residing at Fredericktown, county of Knox, State of Ohio, have invented certain new and useful Improvements in Saws, of which the following a specification.

My invention relates to a new and useful' improvement in crosscut-saws, which I will first describe with reference to the accompanying drawings, and I will then point out in the claim the novel features.

In said drawings, Figure I is a side View of Fig. II is an edge View thereof. Fig. III is a similar View of a inodiiication.

\ My improved saw is made with incisor-teeth l and clearing-teeth Between each pair of clearing-teeth 2 are arran ged a pair of incisors connected by a strengthening-web 3. The incisors are of about the same shape as the clearing-teeth, but are narrower and are sharpened differently. Each tooth has two projecting points or edges. In the clearing-teeth these are sharpened to a straight edge transverse of the saw, while in the incisors they are sharpened to points and are set. There will thus be four cutting-points between each pair of clearing teeth, and each point has one straight side 4 and one inclined side 5. The direction of sharpening is alternate on the incisors, as shown in Fig. II, where two points on the same tooth are oppositely sharpened and set, or, as shown in Fig. III, where the points of adjacent teeth are oppositely sharpened and set. Thus in either direction of motion of the saw there will be between each pair of Vclearers two cutting-points in action, each having a straight side cutting against the wood. It is apparent that a point with a straight or vertical cutting edge or side will hug more closely to the wood than one with an inclined side or edge, and that thus the clearing-teeth will remove larger chips or grains of sawdust.

The teeth are of equal width from top to bottoin-z'- c., their sides are parallel from top 4to bottoin-so that they are in as good shape when worn short as when new. The saw is easily sharpened with a three-cornered file. Vith this construction a great number of cutting-points to the foot are provided without a material loss of strength and leaving plenty of room for the sawdust. The points can be set so that in filing the teeth the file can be held with the point upward or sidewise, as desired.

I-Iaving thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

In a crosscut-saw, the combination of the parallel-sided clearing-teeth and parallelsided and paired incisor-teeth between the same, having vertical outer sides extending from base to point, the incisor-teeth sharpened to points having alternate vertical and inclined edges, and the clearing-teeth sharpened to straight edges transverse to the plane Vof the saw, substantially as set forth.

GILBERT C. ILES. Witnesses:

MELVINA A. ILES, L. B. ACKERMAN. 

